title: Body position differentially influences responses to exogenous and endogenous cues.
abstract: The influence of vestibular inputs on exogenous (Exp. 1) and endogenous (Exp. 2) orienting of visual attention was examined. The vestibular system was manipulated through a change in static body position. Participants engaged in an exogenous or endogenous response task while in a seated position, while lying in a prone position, and while in a prone position with their head down and neck flexed (HDNF). An attenuation of inhibition and facilitation effects during the exogenous task was observed in the HDNF position. However, responses to the cues remained similar in the endogenous task, irrespective of body position. The results reveal a potential dissociation between reflexive and volitional orienting of visual attention that is dependent on vestibular inputs.
authors.affiliation: Nipissing University, North Bay, Ontario, Canada, jimmc@nipissingu.ca.
authors.forename: Jim
authors.initials: J
authors.lastname: McAuliffe
authors.forename: Michel J
authors.initials: MJ
authors.lastname: Johnson
authors.forename: Bruce
authors.initials: B
authors.lastname: Weaver
authors.forename: Miranda
authors.initials: M
authors.lastname: Deller-Quinn
authors.forename: Steve
authors.initials: S
authors.lastname: Hansen
mesh_terms: D000293:Adolescent; D000328:Adult; D001288:Attention / Q000502:physiology*; D003463:Cues; D006257:Head / Q000502:physiology; D006801:Humans; D007266:Inhibition, Psychological; D009333:Neck / Q000502:physiology; D009949:Orientation / Q000502:physiology*; D011187:Posture / Q000502:physiology*; D011930:Reaction Time / Q000502:physiology; D012027:Reflex, Vestibulo-Ocular / Q000502:physiology*; D014722:Vestibule, Labyrinth / Q000502:physiology; D014836:Volition / Q000502:physiology; D055815:Young Adult